Improvement in subsoil-plows



'Pfatented Feb. 20, 1877.

ATTORNEYS to the under side of share D.

JAMES J ARRELL, OF THORI TIO WN, INDIANA.

IMPROVEMENT IN SUBjjSOlL-PLOWS.

Specification forming part of Letters Patent No. 187,637, dated February 20, 1877; application filed September 16, 1876.

To all whom it may concern:

Be it known that I, JAMES JARRELL, of- Thorntown, in the county of Boone and State of Indiana, have invented a new and valuable Improvement in Subsoil-Plows and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a perspective View of my subsoil-plow, and Fig. 2 is a plan view of the same. Figs. 3

, and 4 are detail views thereof.

This invention relates to subsoil-pulverizing plows; and the nature of my invention consists in certain improvements therein, as hereinafter more fully set forth and claimed.

In the accompanying drawings, A designates a beam; B, a standard, which is preferably of metal; 0, a mold-board; D, a subsoilplowshare, and E the main part of the landside, which is rigidly connected therewith. F is a supplemental standard, which connects standard B (near the upper end thereof) with land-side E. G is a plate of steel or other metal, the rear part of which sets upon the main part E of the land-side, and the forward part of which is provided with a curved cutting-edge, so as to form a colter. eral outline of plate G very nearly corresponds the middle to one end of a long parallelogram. Its under edge, at the forward end, sets into a groove in the upper side of share D. Plate G thus constitutes at once a colter and a part of a land-side. It is rigidly attached to standards B and F.

H H are cutting-knives for pulverizing the earth, and are made in a single piece, the lower plate I of whichis detachably connected 0 is a moldboard, which is detachably connected to stand ard B by bolts, which pass through holes in said standard, and through similar holes in a V-shaped connecting-plate, K, which is bolted nected to supplemental standard F by means ofa brace-arm, L, and a detachable bolt, which passes? through a flange, e, on the end of said brace-arm, and through a perforation in said supplemental standard. As there are more holes in each one of said standards B and F than in the attachments which register therewith, and through which the bolts pass, it follows that mold-board 0 is the slice of warm surface-earth cut off by said mold-board and thrown from the furrow.

By removing the cutter-blades or knives H H, andi adjusting mold-board G at thelowest possible point, I have a compact plow for ordinary use. I

When used for subsoiling, the shareD and colter G cut oil a sliceof subsoil, which will be regulated in its thickness by the space between mold-board (l and share D, and this slice is made to pass through and against out ting-blades H H, which pulverize it, while the mold-board 0 turns over the warm surfacesoil in greater or less quantity, according to adjustment.

Plate G, forming a colterand part of a land-side, as described, is detachably connected to .standard B, and to supplemental standard} F, and is without other attachment except the groove in share D, so that the device may be used as, a whole without said plate, if preferred.

What I claim as new, and desire to secure by Letters Patent, is-

The combination of adjustable mold-board O with subsoil share D and cutting-blades H H, substantially as and for'the purpose set fort In testimony that I claim the above I have hereunto subscribed my name in the presence WASH. GRIFFIN, L. I). Oman.

of the mold-board, 

